My problems with this design:
Armour and SI should be higher maybe SI 70 or so and armor approaching 100. The Defiant is a fast attack ship to take on the Borg so it needs to be durable. Also, the number/placement of the LPLs. Defiant (as with most ST ships) focuses on end on fire. four of those 70pt LPLs in the nose. Maybe sub-cap missiles for the Qtorps (more damage than standard Cap missiles). Maybe some NPPCs to represent phaser strips down the side. Drop the speed to 6/9 max as Defiant can be rundown by the Jem Hadar attck ships...
Even at 5/8 speed, the design is still pressed for tonnage. I can increase the durability of the design (at expense of firepower):
AeroTech 2 Vessel Technical Readout
* CUSTOM WEAPONS
Class/Model/Name: Defiant 3
Tech: Clan / 3075
Vessel Type: WarShip
Rules: Level 3, Custom design
Rules Set: AeroTech2
Mass: 140,000 tons
K-F Drive System: (Unknown)
Length: 300 meters
Sail Diameter: 750 meters
Power Plant: Standard
Safe Thrust: 5
Maximum Thrust: 8
Armor Type: Lamellor Ferro-carbide
Armament:
280 Large Pulse Laser
48 LAMS*
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Class/Model/Name: Defiant 3
Mass: 140,000 tons
Equipment: Mass
Power Plant, Drive & Control: 42,000.00
Thrust: Safe Thrust: 5
Maximum Thrust: 8
Kearny-Fuchida Hyperdrive: Compact (Integrity = 5) 63,350.00
Lithium Fusion Battery 1,400.00
Jump Sail (Detachable): (Integrity = 3) 37.00
Structural Integrity: 132 18,480.00
Total Heat Sinks: 2,081 Double 1,747.00
Fuel & Fuel Pumps: 2,550.00
Bridge, Controls, Radar, Computer & Attitude Thrusters: 350.00
Fire Control Computers: 639.00
Food & Water: (300 days supply) 630.50
Hyperpulse Generator: 50.00
Armor Type: Lamellor Ferro-carbide (669 total armor pts) 369.50
Capital Scale Armor Pts
Location: L / R
Fore: 144
Fore-Left/Right: 120/120
Aft-Left/Right: 95/95
Aft: 95
DropShip Capacity: 1 Docking Hardpoints 1,000.00
Grav Decks #1 - 2: (25-meter diameter) 100.00
Life Boats: 36 (7 tons each) 252.00
Escape Pods: 36 (7 tons each) 252.00
Crew and Passengers:
75 Officers (64 minimum) 750.00
260 Crew (0 minimum) 1,820.00
60 Gunners (55 minimum) 420.00
25 Marine Battle Armor Troopers/Elementals 175.00
Weapons and Equipment Loc SRV MRV LRV ERV Heat Mass
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70 Large Pulse Laser Nose 70(700)70(700)70(700) -- 700 420.00
70 Large Pulse Laser Nose 70(700)70(700)70(700) -- 700 420.00
12 LAMS* Nose -- -- -- -- 60 12.00
20 Large Pulse Laser FL/R 20(200)20(200)20(200) -- 400 240.00
20 Large Pulse Laser L/RBS 20(200)20(200)20(200) -- 400 240.00
12 LAMS* L/RBS -- -- -- -- 120 24.00
20 Large Pulse Laser AL/R 20(200)20(200)20(200) -- 400 240.00
20 Large Pulse Laser Aft 20(200)20(200)20(200) -- 200 120.00
12 LAMS* Aft -- -- -- -- 60 12.00
1 Lot Spare Parts (1.00%) 1,400.00
1 Large Naval Comm-Scanner 500.00
------------------------------------------------------------------------------
TOTALS: Heat: 3,040 140,000.00
Tons Left: .00
Calculated Factors:
Total Cost: 9,400,184,000 C-Bills
Battle Value: 86,107
Cost per BV: 109,168.64
Weapon Value: 77,007 (Ratio = .89)
Damage Factors: SRV = 2,844; MRV = 2,567; LRV = 1,348; ERV = 0
Maintenance: Maintenance Point Value (MPV) = 457,735
(150,030 Structure, 237,335 Life Support, 70,370 Weapons)
Support Points (SP) = 471,535 (103% of MPV)
BattleForce2: Not applicable